How long will it take them both together to eat 32 Chakri? And how long would it take them both to eat 40 Chakri?

Question

Riya loves Chakri.
She can eat 32 of them in an hour.
Her brother Piyush needs three hours to eat the same amount.
How long will it take them both together to eat 32 Chakri?
And how long would it take them both together to eat 40 Chakri?

Answer 1

Riya --> 32 Chakri 1 hr= 32 Chakri 60 min = 8 Chakri 15 min =24 Chakri 45 min
Piyush --> 32 Chakri 3 hrs= 32 Chakri 180 min = 8 Chakri 45 min
Together --> 24+8=32 Chakri 45 min
40 Chakri- x min
x=40*45/32=56.25 min = 56 min 15 sec